MCP23x17 Bidirectional 16-Bit I/O Expander I2C/SPI

Description:

The MCP23x17 is capable of converting 16-bit parallel data to serial data of the I2C/SPI interface and converting each other. An internal integrated power-on reset (POR) circuit is reset to the device’s default state. The two opposites become the interrupt source output. The polarity toggle register configures the GPIO input polarity.

Specification:

• High-speed I2C interface (MCP23017):
  • 100kHz
  • 400kHz
  • 1.7MHz
• High-speed SPI interface (MCP23S17):
  • 10 MHz (maximum)
• Three hardware address pins to allow up to eight devices on the bus
• VCC: Power supply pin
• INTA: A port interrupt output
• INTB: B port terminal output
• MCP23017:
  • SCL: I2C clock signal line
  • SDA: I2C data signal line
• MCP32S17:
  • SO: SPI data out signal line
  • SI: SPI data in signal line
  • CS: SPI chip select signal line
  • SCK: SPI clock signal line
• RESET: level reset device
• A0, A1, A2: I2C/SPI device address configuration pins
• The default is 0100000x, and the I2C bus can expand 8 identical devices.
• GPA0~GPA7: A port 8-bit input and output pin (default input mode)
• GPB0~GPB7: B port 8-bit input and output pin (default input mode)
• Low Standby Current: 1 μA (max.)
• Operating Voltage:
  • 1.8V to 5.5V @ -40°C to +85°C
  • 2.7V to 5.5V @ -40°C to +85°C
  • 4.5V to 5.5V @ -40°C to +125°C